Roman Abramovich and Dasha Zhukova, glittering fixtures in London, St. Barts and the French Riviera, have been keeping a low profile since Abramovich’s friend, Vladimir Putin, invaded Ukraine. Abramovich owns...

After gay activists disrupted the opening night of the Metropolitan Opera last month, the same group protested at Carnegie Hall on Thursday night. The demonstration again targeted Valery Gergiev, conductor...